TV-Series
Description
Tōka Kuroitsu serves as an assistant researcher in Agastia's Monster Development Department, designing combat monsters to counter heroes like the recurring Divine Swordsman Blader. Her daily battles involve navigating organizational hurdles: racing against tight deadlines, securing vital resources and funding, adapting to sudden leadership specification changes, and delivering persuasive proposals in high-stakes meetings.

She possesses red hair, blue eyes, and stands 159 cm tall, typically dressed in professional laboratory attire. While she directs monsters during field operations, her identity remains concealed from heroes and the public.

Professionally, she reports directly to the laid-back department head, Doctor Hajime Sadamaki, often stepping in to resolve operational issues caused by his delegation. She mentors Wolf Bete, a modified wolf-human survivor reassigned to her department, viewing their relationship as professional guardianship despite his romantic interest. She frequently interacts with pragmatic Chief of Staff Megistus and contends with disruptive, impulsive directives from supreme leader Akashic.

A significant personal connection exists with Kenji Sadamaki, the civilian identity of Blader, who works at a convenience store she regularly visits. Neither recognizes the other's secret role: Kenji remains unaware she builds monsters for Agastia, while she doesn't realize her lunchtime contact is Agastia's primary enemy. Unbeknownst to both, Kenji is her superior Doctor Sadamaki's younger brother.

Her professional development involves adapting to Agastia's corporate structure, where resource battles, executive whims, and budget cuts compromise monster designs. Examples include Hydra's reduction from eight venom-spitting heads to four non-venomous heads with conflicting personalities, and Cannon Thunderbird's shift from an armored mech to a mascot-like bird due to design-by-committee. She also meets thematic demands, like creating Valentine's Day-themed monsters such as Melty.

Throughout her tenure, she exhibits increasing adaptability in balancing Agastia's operational constraints—including strict ethical policies prohibiting civilian harm—against the practical demands of monster development. This occurs within a workplace culture that, despite its "evil" designation, enforces employee welfare standards like paid leave, contrasting rival entities like the exploitative Black Lore.